Level.



LI'. L. RUSSELL. LEVEL.

APPLIUATION FILED MM 7, 1909.

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lSpeccation of Letters Patent. Patientin@ July 26, 1911,(

dllipplication tiled May 7, 1902i. Serial No. 494,533.

To all whom it may concern:

Be it known that l, JOHN LiTLe ltnssnnn, a citizen of the United States, and a resident oi Albion, in the county et' Mendocino and tritateoi California, have invented a new and llrnproved Level, ol which the following is a i'ull, clear, and exact description.

rlhe invention is an improvement in levels ci thecharecter disclosed in Letters Patent liluinber BQGU, granted to me `duly l0, 1905, the same embodyingtransparent tubes connected together at their lower ends by a ilexible tube, the whole being suliiciently filled with a liquid to stand in both tubes at the saine tiine.

The present" .invention contemplates a' level ci the saine general construction which may be operated by one person, even though the View be obstructed between two accessible points between which the level is taken, and consists oi' Anovel features as defined in the appended clairns Reference is to be had to the accompanying drawings forming a part )t this specilication, in which. sirniler characters of reference indicate corresponding parts in all the views. 4

Figure 1 is a broken side elevation, partly in central vertical section, ci a level having iny improvements; lfig. 2 is a cross-section oit the sance on the line 2-2 oit llig. 1; Fig. d is a cross-section on the line 3--3 oit l? ig. 1; and llig. at is a central longitudinal section through the upperend portion of one of the tubular standards.

rllhe invention primarily consists oi' tubular standards adapted to contain a liquid, each having a seating base 5 through which the standards are connected together by a Horrible tube or hose 6. Fory this pur ose a nipple l is threadedinto the side ol each base 5, and has a corrugated outer end portion over which the hose is forced and is' pressed into the coii'rugations by a band or collar d. The hose 6 is constructed of two oi' incre sections, the sections being coupled together by a corrugated nipple 9 extending into the abutting ends olf the hose, and a collar 10 surrounding the two sections ot' the hose and forcing them into the corrugations, .as in the case of the collars il. The shape and size ot the bases 5 are such es to preventl the tubular standards from being easily tipped over, and each has an internally-threaded recess at the top, into which is screwed a pipe 11, longitudinally slotted at opposite sides and surrounding a glass vtube 12, the pipe and tube iorining thebody the standards, and-thc sleeves being located at points intermediate the length v of the lstandards and each having openings or slots at opposite sides, arranged to register with the slots in then sides of the device 11.

Gaskets 16 and 17 are respectively placed i at the opposite ends of the body portions of the tubular standards and provide liquidtirrht joints at thecapsandbases, the gasket 1 6 which is arranged under thecap, having a relatively small central aperture 16a. rlhe caps ldeach have a tubularair chamberabove the adjacent gasket, which has a contracted opening extending through the top, preferably of conical torni. Athimble valve 18 having a correspondingly-shaped upper end is arranged in each of the air chambers, and has its lower edge niclred to admit of the draining of the Water or other liquid which the level vcontains and permit the iidnolission of air alike at both ends of the eve Each seating base 5 of the tubular standards has a centrally arranged prick-punch 19 projecting from its under side, and simi-` -lar unches 2() extending-from the side direct y opposite tite connection with the hose 6. AitA the saine elevation above their respective bases 5, each glass tube 12 has a hair line 21 arranged about midway its height and similar lines 22 are placed on the sleeves 13 near the centers of the openings 15.

The level is lilled with water or other Asuitable liquid 23 until the level of the liquid stands in both standards even with the hair lines 21, and in using the level one standard is seated at the point to which the level is to be referred, and the other'standard is carried to the place at which the level is to be determined, the length and flexibility ot' the tube being such as to permit oi the separation oi' the standards over any straight or circuitous route. The stndard at the point at which the level is to be determined is brought-to the same elevation as the opposite standard, by raisingl and lowering the standard until the required level is sie.`

in register with the haii .line 21. The levels v yseating base and a at the two points are marked on adjacent objects by either of the punches 19 or 20, or

both. By adjusting the sleeves 13 along the 'length of their respective pipes, any desired difference of level between two distantV points may be obtained. The liquid in flowing.)r from one tubular standard to the other coinpresses the air in the upper portion of the Standard toward which itis traveling, and in this way closes the thirnble valve before the liquid has had time to rise sufficiently to flow out. `The seat-ing base of the standard not only enables the leveling;r of two distant points by one person but also adapts the device to he used with accuracy in many places in which levels of this character, without the bases, would not be practical, as, for example, in leveling the line shafting in a shop.

Having thus described my invention, 5l claim as new and desire to secure by Letters Patent:

l. A level comprising tubular standards adapted to contain a liquid, eaeh having` a transparent portion through which the liquid is visible. a tube connected at oppositevends with the lower portions of the tubular standards l'or the, passage, of the liquid from one tubular standard to the other. and punehes to marl( the levels on adjaeent objects. with one ol' the punches projecting t'roni the under faee of the base and another 'of the punches projeeting troni the side of the hase.

2. A level comprising; tubular standards having a conduit extending between their lower portions plaein,"r them in eonnnunieation, each standard havin; r an externallythreaded jaeket provided with slots through whieh the liquid levels in the standards are visible, and a gage sleeve threaded on eaeh jat-het and having slots adapted to register with the slots of the Istalnlards.

3. A level eoniprising tubular standards having a conduit extending between their lower pprtious, plaeing` thenl in eonununiea tion-r eaeh standard haviner a removable rap at the top provided with an upwardltY e.\-- tended tubular portion ot' redueed diameter` said upwalilly-extending tubularportion ol eaeh rap having a valve seat. and a tree valve arranged within and `guided bv the walls ol the redueed tubular portion ol' eaeh eap. p

ln testimony whereof' l have` signed in v naine to this speeilieation in the presenee ot' two subseribing witnesses.

'JOHN LY'llill RUSSELL. ll'itnesses:

.lawns Bl. Kuna, l1.,(\. 'naains. 

